Late-time MIR evolution of ILRTs. Left panel: Images of NGC 300 OT in the [4.5] μm channel of Spitzer from the progenitor until the disappearance of the transient. Right panel: Updated version of the figure shown in Adams et al. (2016), with their measurements in the [4.5] μm channel shown as circles. Additional data points for NGC 300 OT and AT 2019abn are shown as stars (upper limits are represented as empty symbols). We also show the JWST data point of AT 2019abn obtained by Rose et al. (2024). The progenitor luminosity of each transient is shown as a horizontal dashed line.